package javaSE.Collection;

import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriterArrayListDemo {
    public static void main(String[] args) {
        List list = new CopyOnWriteArrayList();
        Map map = new Hashtable();
        List list1=new ArrayList();
    }
}
